#!/bin/bash

######################################################################

#

#   tcar.sh -- The CentOS Artwork Repository automation tool.

#

#   Written by:

#   * Alain Reguera Delgado <al@centos.org.cu>, 2009-2013

#

# Copyright (C) 2009-2013 The CentOS Artwork SIG

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or (at

# your option) any later version.

#

# This program is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

#

######################################################################

######################################################################

# Identity

######################################################################

declare -xr TCAR_SCRIPT_NAME="tcar.sh"

declare -xr TCAR_SCRIPT_VERSION='0.8'

declare -xr TCAR_SCRIPT_COMMAND="tcar"

######################################################################

# Paths

######################################################################

# Base directory where repository files are installed in.

declare -xr TCAR_BASEDIR=/usr/share/tcar

# Base directory where final content is produced. This value should be

# customized later by the user.

declare -xr TCAR_WORKDIR=/tmp

# Base directory where automation script modules are installed in.

declare -xr TCAR_SCRIPT_MODULES_BASEDIR=${TCAR_BASEDIR}/modules

# Directory to store temporal files.

declare -xr TCAR_SCRIPT_TEMPDIR=$(mktemp -p /tmp -d ${TCAR_SCRIPT_NAME}-XXXXXX)

# Configuration files in order of reading preference. The last file in

# the list overlaps options set in previous files in the list. Use

# colon character to separate files in the list.

declare -xr TCAR_SCRIPT_CONFIG=${HOME}/.tcar.conf

# Base directory where man pages are searched at.

declare -x TCAR_SCRIPT_MANUALS=/usr/share/man

# Default text editor.

declare -x  TCAR_SCRIPT_EDITOR=/usr/bin/vim

######################################################################

# Internationalization

######################################################################

# Set the script language information using the LC format. This format

# shows both language and country information (e.g., `es_ES').

declare -xr TCAR_SCRIPT_LANG_LC=$(echo ${LANG} | cut -d'.' -f1)

# Set the script language information using the LL format. This format

# shows only the language information (e.g., `es').

declare -xr TCAR_SCRIPT_LANG_LL=$(echo ${TCAR_SCRIPT_LANG_LC} | cut -d'_' -f1)

# Set the script language information using the CC format. This format

# shows only the country information (e.g., `ES').

declare -xr TCAR_SCRIPT_LANG_CC=$(echo ${TCAR_SCRIPT_LANG_LC} | cut -d'_' -f2)

# Set function environments required by GNU gettext system.

. gettext.sh

# Set the script text domain. This information is used by gettext

# system to retrieve translated strings from machine object (MO) files

# with this name. This variable is reset each time a new module is

# loaded, so the correct files can be used.

declare -x TEXTDOMAIN="${TCAR_SCRIPT_NAME}"

# Set the script text domain directory. This information is used by

# gettext system to know where the machine objects are stored in. This

# variable is reset each time a new module is loaded, so the correct

# files can be used.

declare -x TEXTDOMAINDIR=/usr/share/locale

######################################################################

# Global Flags

######################################################################

# Set filter flag (-f|--filter).  This flag is mainly used to reduce

# the number of files to process and is interpreted as egrep-posix

# regular expression.  By default, when this flag is not provided, all

# paths in the working copy will match, except files inside hidden

# directories like `.svn' and `.git' that will be omitted.

declare -x  TCAR_FLAG_FILTER='[[:alnum:]_/-]+'

# Set verbosity flag (-q|--quiet). This flag controls whether

# tcar.sh script prints messages or not. By default, all

# messages are suppressed except those directed to standard error.

declare -x  TCAR_FLAG_QUIET='false'

# Set affirmative flag (-y|--yes). This flag controls whether

# tcar.sh script does or does not pass confirmation request

# points. By default, it doesn't.

declare -x  TCAR_FLAG_YES='false'

# Set debugger flag (-d|--debug). This flag controls whether

# tcar.sh script does or does not print debugging information.

# The tcar.sh script prints debug information to standard

# output.

declare -x  TCAR_FLAG_DEBUG='false'

######################################################################

# Global Functions

######################################################################

# Export script's environment functions.

for SCRIPT_FILE in $(ls ${TCAR_BASEDIR}/tcar_*.sh);do

    if [[ -x ${SCRIPT_FILE} ]];then

        . ${SCRIPT_FILE}

        export -f $(grep '^function ' ${SCRIPT_FILE} | cut -d' ' -f2)

    else

        echo "${SCRIPT_FILE} `gettext "has not execution rights."`"

        exit 1

    fi

done

######################################################################

# Signals

######################################################################

# Trap signals in order to terminate the script execution correctly

# (e.g., removing all temporal files before leaving).  Trapping the

# exit signal seems to be enough by now, since it is always present as

# part of the script execution flow. Each time the tcar.sh

# script is executed it will inevitably end with an EXIT signal at

# some point of its execution, even if it is interrupted in the middle

# of its execution (e.g., through `Ctrl+C').

trap tcar_terminateScriptExecution 0

######################################################################

# Parse Command-line Arguments

######################################################################

declare -x TCAR_MODULE_NAME=''

declare -x TCAR_MODULE_ARGUMENT=''

declare -x TCAR_SCRIPT_ARGUMENT=''

# Retrieve module's name using the first argument of tcar.sh

# script as reference.

if [[ ! ${1} =~ '^-' ]];then

    TCAR_MODULE_NAME="${1}"; shift 1

else

    TCAR_MODULE_NAME=""

fi

# Initialize tcar.sh script specific options. The way tcar.sh script

# retrieves its options isn't as sophisticated (e.g., it doesn't

# provide valid-option verifications) as it is provided by getopt

# command. I cannot use getopt here because it is already used when

# loading module-specific options. Using more than one invocation of

# getopt in the same script is not possible (e.g., one of the

# invocations may enter in conflict with the other one when different

# option definitions are expected in the command-line.)

while true; do

    # Store non-option arguments passed to tcar.sh script.

    if [[ ! ${1} =~ '^-' ]];then

        TCAR_SCRIPT_ARGUMENT="${1} ${TCAR_SCRIPT_ARGUMENT}"

        shift 1

        if [[ $# -gt 0 ]];then

            continue

        else

            break

        fi

    fi

    case "${1}" in

        --help* )

            if [[ -z ${TCAR_MODULE_NAME} ]];then

                # Print tcar.sh script's help. Consider that the

                # --help option can receive an argument by using the

                # equal sign (e.g.,

                # --help=tcar_setModuleEnvironment.sh).  However, it

                # is not possible to use spaces instead of equal sign

                # because that would confuse other options from being

                # parsed.

                tcar_printHelp "${1}"

                exit 0

            else

                # Store the argument for further processing inside the

                # module environment that will be executed later.

                TCAR_MODULE_ARGUMENT="-g ${1} ${TCAR_MODULE_ARGUMENT}"

                shift 1

            fi

            ;;

        --version )

            # Print tcar.sh script's version.

            if [[ -z ${TCAR_MODULE_NAME} ]];then

                tcar_printVersion

                exit 0

            else

                TCAR_MODULE_ARGUMENT="-g ${1} ${TCAR_MODULE_ARGUMENT}"

                shift 1

            fi

            ;;

        --quiet )

            TCAR_FLAG_QUIET='true'

            shift 1

            ;;

        --yes )

            TCAR_FLAG_YES='true'

            shift 1

            ;;

        --debug )

            TCAR_FLAG_DEBUG='true'

            shift 1

            ;;

        * ) 

            # Store module-specific option arguments. This is, all

            # arguments not considered part of tcar.sh script

            # itself. The module-specific option arguments are passed,

            # later, to getopt for option processing, inside the

            # module-specific environments.

            TCAR_MODULE_ARGUMENT="-g ${1} ${TCAR_MODULE_ARGUMENT}"

            shift 1

            if [[ $# -gt 0 ]];then

                continue

            else

                break

            fi

            ;;

    esac

done

# Initiate module-specific environment.

tcar_setModuleEnvironment -m "${TCAR_MODULE_NAME}" ${TCAR_MODULE_ARGUMENT} ${TCAR_SCRIPT_ARGUMENT}

# At this point everything has been done without errors. So, exit

# tcar.sh script successfully.

exit 0